Today Apple announced a new version of the Retina MacBook Pro 15 that unfortunately still has 2GB discrete graphics. The card however is now a AMD Radeon R9 M370X with GDDR5. It's supposedly faster... anyone have the scoop on this?
Edit 1: "Support for up to 5120 by 2160 resolution at 60Hz on a single external display (model with AMD Radeon R9 M370X only)"
Edit 2: Still using Haswell chips, so there will most likely be another release late this year (or early 2016) with Skylake. Today's refresh is a solid upgrade for 2012 Retina or older.
http://www.apple.com/macbook-pro/